dwm.c (view raw)
1/* See LICENSE file for copyright and license details.
2 *
3 * dynamic window manager is designed like any other X client as well. It is
4 * driven through handling X events. In contrast to other X clients, a window
5 * manager selects for SubstructureRedirectMask on the root window, to receive
6 * events about window (dis-)appearance. Only one X connection at a time is
7 * allowed to select for this event mask.
8 *
9 * Calls to fetch an X event from the event queue are blocking. Due reading
10 * status text from standard input, a select()-driven main loop has been
11 * implemented which selects for reads on the X connection and STDIN_FILENO to
12 * handle all data smoothly. The event handlers of dwm are organized in an
13 * array which is accessed whenever a new event has been fetched. This allows
14 * event dispatching in O(1) time.
15 *
16 * Each child of the root window is called a client, except windows which have
17 * set the override_redirect flag. Clients are organized in a global
18 * doubly-linked client list, the focus history is remembered through a global
19 * stack list. Each client contains an array of Bools of the same size as the
20 * global tags array to indicate the tags of a client. For each client dwm
21 * creates a small title window, which is resized whenever the (_NET_)WM_NAME
22 * properties are updated or the client is moved/resized.
23 *
24 * Keys and tagging rules are organized as arrays and defined in the config.h
25 * file. These arrays are kept static in event.o and tag.o respectively,
26 * because no other part of dwm needs access to them. The current layout is
27 * represented by the lt pointer.
28 *
29 * To understand everything else, start reading main().
30 */
31#include <errno.h>
32#include <locale.h>
33#include <regex.h>
34#include <stdarg.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <sys/select.h>
40#include <sys/wait.h>
41#include <X11/cursorfont.h>
42#include <X11/keysym.h>
43#include <X11/Xatom.h>
44#include <X11/Xproto.h>
45#include <X11/Xutil.h>
46
47/* macros */
48#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
49#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
50#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
51
52/* enums */
53enum { BarTop, BarBot, BarOff }; /* bar position */
54enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
55enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
56enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
57enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
58
59/* typedefs */
60typedef struct Client Client;
61struct Client {
62 char name[256];
63 int x, y, w, h;
64 int rx, ry, rw, rh; /* revert geometry */
65 int basew, baseh, incw, inch, maxw, maxh, minw, minh;
66 int minax, maxax, minay, maxay;
67 long flags;
68 unsigned int border, oldborder;
69 Bool isbanned, isfixed, ismax, isfloating;
70 Bool *tags;
71 Client *next;
72 Client *prev;
73 Client *snext;
74 Window win;
75};
76
77typedef struct {
78 int x, y, w, h;
79 unsigned long norm[ColLast];
80 unsigned long sel[ColLast];
81 Drawable drawable;
82 GC gc;
83 struct {
84 int ascent;
85 int descent;
86 int height;
87 XFontSet set;
88 XFontStruct *xfont;
89 } font;
90} DC; /* draw context */
91
92typedef struct {
93 unsigned long mod;
94 KeySym keysym;
95 void (*func)(const char *arg);
96 const char *arg;
97} Key;
98
99typedef struct {
100 const char *symbol;
101 void (*arrange)(void);
102} Layout;
103
104typedef struct {
105 const char *prop;
106 const char *tags;
107 Bool isfloating;
108} Rule;
109
110typedef struct {
111 regex_t *propregex;
112 regex_t *tagregex;
113} Regs;
114
115/* forward declarations */
116static void applyrules(Client *c);
117static void arrange(void);
118static void attach(Client *c);
119static void attachstack(Client *c);
120static void ban(Client *c);
121static void buttonpress(XEvent *e);
122static void checkotherwm(void);
123static void cleanup(void);
124static void compileregs(void);
125static void configure(Client *c);
126static void configurenotify(XEvent *e);
127static void configurerequest(XEvent *e);
128static void destroynotify(XEvent *e);
129static void detach(Client *c);
130static void detachstack(Client *c);
131static void drawbar(void);
132static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
133static void drawtext(const char *text, unsigned long col[ColLast]);
134static void *emallocz(unsigned int size);
135static void enternotify(XEvent *e);
136static void eprint(const char *errstr, ...);
137static void expose(XEvent *e);
138static void floating(void); /* default floating layout */
139static void focus(Client *c);
140static void focusnext(const char *arg);
141static void focusprev(const char *arg);
142static Client *getclient(Window w);
143static unsigned long getcolor(const char *colstr);
144static long getstate(Window w);
145static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
146static void grabbuttons(Client *c, Bool focused);
147static unsigned int idxoftag(const char *tag);
148static void initfont(const char *fontstr);
149static Bool isarrange(void (*func)());
150static Bool isoccupied(unsigned int t);
151static Bool isprotodel(Client *c);
152static Bool isvisible(Client *c);
153static void keypress(XEvent *e);
154static void killclient(const char *arg);
155static void leavenotify(XEvent *e);
156static void manage(Window w, XWindowAttributes *wa);
157static void mappingnotify(XEvent *e);
158static void maprequest(XEvent *e);
159static void movemouse(Client *c);
160static Client *nexttiled(Client *c);
161static void propertynotify(XEvent *e);
162static void quit(const char *arg);
163static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
164static void resizemouse(Client *c);
165static void restack(void);
166static void run(void);
167static void scan(void);
168static void setclientstate(Client *c, long state);
169static void setlayout(const char *arg);
170static void setmwfact(const char *arg);
171static void setup(void);
172static void spawn(const char *arg);
173static void tag(const char *arg);
174static unsigned int textnw(const char *text, unsigned int len);
175static unsigned int textw(const char *text);
176static void tile(void);
177static void togglebar(const char *arg);
178static void togglefloating(const char *arg);
179static void togglemax(const char *arg);
180static void toggletag(const char *arg);
181static void toggleview(const char *arg);
182static void unban(Client *c);
183static void unmanage(Client *c);
184static void unmapnotify(XEvent *e);
185static void updatebarpos(void);
186static void updatesizehints(Client *c);
187static void updatetitle(Client *c);
188static void view(const char *arg);
189static int xerror(Display *dpy, XErrorEvent *ee);
190static int xerrordummy(Display *dsply, XErrorEvent *ee);
191static int xerrorstart(Display *dsply, XErrorEvent *ee);
192static void zoom(const char *arg);
193
194/* variables */
195static char stext[256];
196static double mwfact;
197static int screen, sx, sy, sw, sh, wax, way, waw, wah;
198static int (*xerrorxlib)(Display *, XErrorEvent *);
199static unsigned int bh, bpos, ntags;
200static unsigned int blw = 0;
201static unsigned int ltidx = 0; /* default */
202static unsigned int nlayouts = 0;
203static unsigned int nrules = 0;
204static unsigned int numlockmask = 0;
205static void (*handler[LASTEvent]) (XEvent *) = {
206 [ButtonPress] = buttonpress,
207 [ConfigureRequest] = configurerequest,
208 [ConfigureNotify] = configurenotify,
209 [DestroyNotify] = destroynotify,
210 [EnterNotify] = enternotify,
211 [LeaveNotify] = leavenotify,
212 [Expose] = expose,
213 [KeyPress] = keypress,
214 [MappingNotify] = mappingnotify,
215 [MapRequest] = maprequest,
216 [PropertyNotify] = propertynotify,
217 [UnmapNotify] = unmapnotify
218};
219static Atom wmatom[WMLast], netatom[NetLast];
220static Bool otherwm, readin;
221static Bool running = True;
222static Bool *seltags;
223static Bool selscreen = True;
224static Client *clients = NULL;
225static Client *sel = NULL;
226static Client *stack = NULL;
227static Cursor cursor[CurLast];
228static Display *dpy;
229static DC dc = {0};
230static Window barwin, root;
231static Regs *regs = NULL;
232
233/* configuration, allows nested code to access above variables */
234#include "config.h"
235
236/* functions*/
237static void
238applyrules(Client *c) {
239 static char buf[512];
240 unsigned int i, j;
241 regmatch_t tmp;
242 Bool matched = False;
243 XClassHint ch = { 0 };
244
245 /* rule matching */
246 XGetClassHint(dpy, c->win, &ch);
247 snprintf(buf, sizeof buf, "%s:%s:%s",
248 ch.res_class ? ch.res_class : "",
249 ch.res_name ? ch.res_name : "", c->name);
250 for(i = 0; i < nrules; i++)
251 if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
252 c->isfloating = rules[i].isfloating;
253 for(j = 0; regs[i].tagregex && j < ntags; j++) {
254 if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
255 matched = True;
256 c->tags[j] = True;
257 }
258 }
259 }
260 if(ch.res_class)
261 XFree(ch.res_class);
262 if(ch.res_name)
263 XFree(ch.res_name);
264 if(!matched)
265 for(i = 0; i < ntags; i++)
266 c->tags[i] = seltags[i];
267}
268
269static void
270arrange(void) {
271 Client *c;
272
273 for(c = clients; c; c = c->next)
274 if(isvisible(c))
275 unban(c);
276 else
277 ban(c);
278 layouts[ltidx].arrange();
279 focus(NULL);
280 restack();
281}
282
283static void
284attach(Client *c) {
285 if(clients)
286 clients->prev = c;
287 c->next = clients;
288 clients = c;
289}
290
291static void
292attachstack(Client *c) {
293 c->snext = stack;
294 stack = c;
295}
296
297static void
298ban(Client *c) {
299 if(c->isbanned)
300 return;
301 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
302 c->isbanned = True;
303}
304
305static void
306buttonpress(XEvent *e) {
307 unsigned int i, x;
308 Client *c;
309 XButtonPressedEvent *ev = &e->xbutton;
310
311 if(barwin == ev->window) {
312 x = 0;
313 for(i = 0; i < ntags; i++) {
314 x += textw(tags[i]);
315 if(ev->x < x) {
316 if(ev->button == Button1) {
317 if(ev->state & MODKEY)
318 tag(tags[i]);
319 else
320 view(tags[i]);
321 }
322 else if(ev->button == Button3) {
323 if(ev->state & MODKEY)
324 toggletag(tags[i]);
325 else
326 toggleview(tags[i]);
327 }
328 return;
329 }
330 }
331 if((ev->x < x + blw) && ev->button == Button1)
332 setlayout(NULL);
333 }
334 else if((c = getclient(ev->window))) {
335 focus(c);
336 if(CLEANMASK(ev->state) != MODKEY)
337 return;
338 if(ev->button == Button1) {
339 if(!isarrange(floating) && !c->isfloating)
340 togglefloating(NULL);
341 else
342 restack();
343 movemouse(c);
344 }
345 else if(ev->button == Button2) {
346 if(isarrange(tile) && !c->isfixed && c->isfloating)
347 togglefloating(NULL);
348 else
349 zoom(NULL);
350 }
351 else if(ev->button == Button3 && !c->isfixed) {
352 if(!isarrange(floating) && !c->isfloating)
353 togglefloating(NULL);
354 else
355 restack();
356 resizemouse(c);
357 }
358 }
359}
360
361static void
362checkotherwm(void) {
363 otherwm = False;
364 XSetErrorHandler(xerrorstart);
365
366 /* this causes an error if some other window manager is running */
367 XSelectInput(dpy, root, SubstructureRedirectMask);
368 XSync(dpy, False);
369 if(otherwm)
370 eprint("dwm: another window manager is already running\n");
371 XSync(dpy, False);
372 XSetErrorHandler(NULL);
373 xerrorxlib = XSetErrorHandler(xerror);
374 XSync(dpy, False);
375}
376
377static void
378cleanup(void) {
379 close(STDIN_FILENO);
380 while(stack) {
381 unban(stack);
382 unmanage(stack);
383 }
384 if(dc.font.set)
385 XFreeFontSet(dpy, dc.font.set);
386 else
387 XFreeFont(dpy, dc.font.xfont);
388 XUngrabKey(dpy, AnyKey, AnyModifier, root);
389 XFreePixmap(dpy, dc.drawable);
390 XFreeGC(dpy, dc.gc);
391 XDestroyWindow(dpy, barwin);
392 XFreeCursor(dpy, cursor[CurNormal]);
393 XFreeCursor(dpy, cursor[CurResize]);
394 XFreeCursor(dpy, cursor[CurMove]);
395 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
396 XSync(dpy, False);
397 free(seltags);
398}
399
400static void
401compileregs(void) {
402 unsigned int i;
403 regex_t *reg;
404
405 if(regs)
406 return;
407 nrules = sizeof rules / sizeof rules[0];
408 regs = emallocz(nrules * sizeof(Regs));
409 for(i = 0; i < nrules; i++) {
410 if(rules[i].prop) {
411 reg = emallocz(sizeof(regex_t));
412 if(regcomp(reg, rules[i].prop, REG_EXTENDED))
413 free(reg);
414 else
415 regs[i].propregex = reg;
416 }
417 if(rules[i].tags) {
418 reg = emallocz(sizeof(regex_t));
419 if(regcomp(reg, rules[i].tags, REG_EXTENDED))
420 free(reg);
421 else
422 regs[i].tagregex = reg;
423 }
424 }
425}
426
427static void
428configure(Client *c) {
429 XConfigureEvent ce;
430
431 ce.type = ConfigureNotify;
432 ce.display = dpy;
433 ce.event = c->win;
434 ce.window = c->win;
435 ce.x = c->x;
436 ce.y = c->y;
437 ce.width = c->w;
438 ce.height = c->h;
439 ce.border_width = c->border;
440 ce.above = None;
441 ce.override_redirect = False;
442 XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
443}
444
445static void
446configurenotify(XEvent *e) {
447 XConfigureEvent *ev = &e->xconfigure;
448
449 if (ev->window == root && (ev->width != sw || ev->height != sh)) {
450 sw = ev->width;
451 sh = ev->height;
452 XFreePixmap(dpy, dc.drawable);
453 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
454 XResizeWindow(dpy, barwin, sw, bh);
455 updatebarpos();
456 arrange();
457 }
458}
459
460static void
461configurerequest(XEvent *e) {
462 Client *c;
463 XConfigureRequestEvent *ev = &e->xconfigurerequest;
464 XWindowChanges wc;
465
466 if((c = getclient(ev->window))) {
467 c->ismax = False;
468 if(ev->value_mask & CWBorderWidth)
469 c->border = ev->border_width;
470 if(c->isfixed || c->isfloating || isarrange(floating)) {
471 if(ev->value_mask & CWX)
472 c->x = ev->x;
473 if(ev->value_mask & CWY)
474 c->y = ev->y;
475 if(ev->value_mask & CWWidth)
476 c->w = ev->width;
477 if(ev->value_mask & CWHeight)
478 c->h = ev->height;
479 if((c->x + c->w) > sw && c->isfloating)
480 c->x = sw / 2 - c->w / 2; /* center in x direction */
481 if((c->y + c->h) > sh && c->isfloating)
482 c->y = sh / 2 - c->h / 2; /* center in y direction */
483 if((ev->value_mask & (CWX | CWY))
484 && !(ev->value_mask & (CWWidth | CWHeight)))
485 configure(c);
486 if(isvisible(c))
487 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
488 }
489 else
490 configure(c);
491 }
492 else {
493 wc.x = ev->x;
494 wc.y = ev->y;
495 wc.width = ev->width;
496 wc.height = ev->height;
497 wc.border_width = ev->border_width;
498 wc.sibling = ev->above;
499 wc.stack_mode = ev->detail;
500 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
501 }
502 XSync(dpy, False);
503}
504
505static void
506destroynotify(XEvent *e) {
507 Client *c;
508 XDestroyWindowEvent *ev = &e->xdestroywindow;
509
510 if((c = getclient(ev->window)))
511 unmanage(c);
512}
513
514static void
515detach(Client *c) {
516 if(c->prev)
517 c->prev->next = c->next;
518 if(c->next)
519 c->next->prev = c->prev;
520 if(c == clients)
521 clients = c->next;
522 c->next = c->prev = NULL;
523}
524
525static void
526detachstack(Client *c) {
527 Client **tc;
528
529 for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
530 *tc = c->snext;
531}
532
533static void
534drawbar(void) {
535 int i, x;
536
537 dc.x = dc.y = 0;
538 for(i = 0; i < ntags; i++) {
539 dc.w = textw(tags[i]);
540 if(seltags[i]) {
541 drawtext(tags[i], dc.sel);
542 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
543 }
544 else {
545 drawtext(tags[i], dc.norm);
546 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
547 }
548 dc.x += dc.w;
549 }
550 dc.w = blw;
551 drawtext(layouts[ltidx].symbol, dc.norm);
552 x = dc.x + dc.w;
553 dc.w = textw(stext);
554 dc.x = sw - dc.w;
555 if(dc.x < x) {
556 dc.x = x;
557 dc.w = sw - x;
558 }
559 drawtext(stext, dc.norm);
560 if((dc.w = dc.x - x) > bh) {
561 dc.x = x;
562 if(sel) {
563 drawtext(sel->name, dc.sel);
564 drawsquare(sel->ismax, sel->isfloating, dc.sel);
565 }
566 else
567 drawtext(NULL, dc.norm);
568 }
569 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
570 XSync(dpy, False);
571}
572
573static void
574drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
575 int x;
576 XGCValues gcv;
577 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
578
579 gcv.foreground = col[ColFG];
580 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
581 x = (dc.font.ascent + dc.font.descent + 2) / 4;
582 r.x = dc.x + 1;
583 r.y = dc.y + 1;
584 if(filled) {
585 r.width = r.height = x + 1;
586 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
587 }
588 else if(empty) {
589 r.width = r.height = x;
590 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
591 }
592}
593
594static void
595drawtext(const char *text, unsigned long col[ColLast]) {
596 int x, y, w, h;
597 static char buf[256];
598 unsigned int len, olen;
599 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
600
601 XSetForeground(dpy, dc.gc, col[ColBG]);
602 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
603 if(!text)
604 return;
605 w = 0;
606 olen = len = strlen(text);
607 if(len >= sizeof buf)
608 len = sizeof buf - 1;
609 memcpy(buf, text, len);
610 buf[len] = 0;
611 h = dc.font.ascent + dc.font.descent;
612 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
613 x = dc.x + (h / 2);
614 /* shorten text if necessary */
615 while(len && (w = textnw(buf, len)) > dc.w - h)
616 buf[--len] = 0;
617 if(len < olen) {
618 if(len > 1)
619 buf[len - 1] = '.';
620 if(len > 2)
621 buf[len - 2] = '.';
622 if(len > 3)
623 buf[len - 3] = '.';
624 }
625 if(w > dc.w)
626 return; /* too long */
627 XSetForeground(dpy, dc.gc, col[ColFG]);
628 if(dc.font.set)
629 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
630 else
631 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
632}
633
634static void *
635emallocz(unsigned int size) {
636 void *res = calloc(1, size);
637
638 if(!res)
639 eprint("fatal: could not malloc() %u bytes\n", size);
640 return res;
641}
642
643static void
644enternotify(XEvent *e) {
645 Client *c;
646 XCrossingEvent *ev = &e->xcrossing;
647
648 if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
649 return;
650 if((c = getclient(ev->window)))
651 focus(c);
652 else if(ev->window == root) {
653 selscreen = True;
654 focus(NULL);
655 }
656}
657
658static void
659eprint(const char *errstr, ...) {
660 va_list ap;
661
662 va_start(ap, errstr);
663 vfprintf(stderr, errstr, ap);
664 va_end(ap);
665 exit(EXIT_FAILURE);
666}
667
668static void
669expose(XEvent *e) {
670 XExposeEvent *ev = &e->xexpose;
671
672 if(ev->count == 0) {
673 if(barwin == ev->window)
674 drawbar();
675 }
676}
677
678static void
679floating(void) { /* default floating layout */
680 Client *c;
681
682 for(c = clients; c; c = c->next)
683 if(isvisible(c))
684 resize(c, c->x, c->y, c->w, c->h, True);
685}
686
687static void
688focus(Client *c) {
689 if((!c && selscreen) || (c && !isvisible(c)))
690 for(c = stack; c && !isvisible(c); c = c->snext);
691 if(sel && sel != c) {
692 grabbuttons(sel, False);
693 XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
694 }
695 if(c) {
696 detachstack(c);
697 attachstack(c);
698 grabbuttons(c, True);
699 }
700 sel = c;
701 drawbar();
702 if(!selscreen)
703 return;
704 if(c) {
705 XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
706 XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
707 }
708 else
709 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
710}
711
712static void
713focusnext(const char *arg) {
714 Client *c;
715
716 if(!sel)
717 return;
718 for(c = sel->next; c && !isvisible(c); c = c->next);
719 if(!c)
720 for(c = clients; c && !isvisible(c); c = c->next);
721 if(c) {
722 focus(c);
723 restack();
724 }
725}
726
727static void
728focusprev(const char *arg) {
729 Client *c;
730
731 if(!sel)
732 return;
733 for(c = sel->prev; c && !isvisible(c); c = c->prev);
734 if(!c) {
735 for(c = clients; c && c->next; c = c->next);
736 for(; c && !isvisible(c); c = c->prev);
737 }
738 if(c) {
739 focus(c);
740 restack();
741 }
742}
743
744static Client *
745getclient(Window w) {
746 Client *c;
747
748 for(c = clients; c && c->win != w; c = c->next);
749 return c;
750}
751
752static unsigned long
753getcolor(const char *colstr) {
754 Colormap cmap = DefaultColormap(dpy, screen);
755 XColor color;
756
757 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
758 eprint("error, cannot allocate color '%s'\n", colstr);
759 return color.pixel;
760}
761
762static long
763getstate(Window w) {
764 int format, status;
765 long result = -1;
766 unsigned char *p = NULL;
767 unsigned long n, extra;
768 Atom real;
769
770 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
771 &real, &format, &n, &extra, (unsigned char **)&p);
772 if(status != Success)
773 return -1;
774 if(n != 0)
775 result = *p;
776 XFree(p);
777 return result;
778}
779
780static Bool
781gettextprop(Window w, Atom atom, char *text, unsigned int size) {
782 char **list = NULL;
783 int n;
784 XTextProperty name;
785
786 if(!text || size == 0)
787 return False;
788 text[0] = '\0';
789 XGetTextProperty(dpy, w, &name, atom);
790 if(!name.nitems)
791 return False;
792 if(name.encoding == XA_STRING)
793 strncpy(text, (char *)name.value, size - 1);
794 else {
795 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
796 && n > 0 && *list)
797 {
798 strncpy(text, *list, size - 1);
799 XFreeStringList(list);
800 }
801 }
802 text[size - 1] = '\0';
803 XFree(name.value);
804 return True;
805}
806
807static void
808grabbuttons(Client *c, Bool focused) {
809 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
810
811 if(focused) {
812 XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
813 GrabModeAsync, GrabModeSync, None, None);
814 XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
815 GrabModeAsync, GrabModeSync, None, None);
816 XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
817 GrabModeAsync, GrabModeSync, None, None);
818 XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
819 GrabModeAsync, GrabModeSync, None, None);
820
821 XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
822 GrabModeAsync, GrabModeSync, None, None);
823 XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
824 GrabModeAsync, GrabModeSync, None, None);
825 XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
826 GrabModeAsync, GrabModeSync, None, None);
827 XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
828 GrabModeAsync, GrabModeSync, None, None);
829
830 XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
831 GrabModeAsync, GrabModeSync, None, None);
832 XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
833 GrabModeAsync, GrabModeSync, None, None);
834 XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
835 GrabModeAsync, GrabModeSync, None, None);
836 XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
837 GrabModeAsync, GrabModeSync, None, None);
838 }
839 else
840 XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
841 GrabModeAsync, GrabModeSync, None, None);
842}
843
844static unsigned int
845idxoftag(const char *tag) {
846 unsigned int i;
847
848 for(i = 0; i < ntags; i++)
849 if(tags[i] == tag)
850 return i;
851 return 0;
852}
853
854static void
855initfont(const char *fontstr) {
856 char *def, **missing;
857 int i, n;
858
859 missing = NULL;
860 if(dc.font.set)
861 XFreeFontSet(dpy, dc.font.set);
862 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
863 if(missing) {
864 while(n--)
865 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
866 XFreeStringList(missing);
867 }
868 if(dc.font.set) {
869 XFontSetExtents *font_extents;
870 XFontStruct **xfonts;
871 char **font_names;
872 dc.font.ascent = dc.font.descent = 0;
873 font_extents = XExtentsOfFontSet(dc.font.set);
874 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
875 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
876 if(dc.font.ascent < (*xfonts)->ascent)
877 dc.font.ascent = (*xfonts)->ascent;
878 if(dc.font.descent < (*xfonts)->descent)
879 dc.font.descent = (*xfonts)->descent;
880 xfonts++;
881 }
882 }
883 else {
884 if(dc.font.xfont)
885 XFreeFont(dpy, dc.font.xfont);
886 dc.font.xfont = NULL;
887 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
888 || !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
889 eprint("error, cannot load font: '%s'\n", fontstr);
890 dc.font.ascent = dc.font.xfont->ascent;
891 dc.font.descent = dc.font.xfont->descent;
892 }
893 dc.font.height = dc.font.ascent + dc.font.descent;
894}
895
896static Bool
897isarrange(void (*func)())
898{
899 return func == layouts[ltidx].arrange;
900}
901
902static Bool
903isoccupied(unsigned int t) {
904 Client *c;
905
906 for(c = clients; c; c = c->next)
907 if(c->tags[t])
908 return True;
909 return False;
910}
911
912static Bool
913isprotodel(Client *c) {
914 int i, n;
915 Atom *protocols;
916 Bool ret = False;
917
918 if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
919 for(i = 0; !ret && i < n; i++)
920 if(protocols[i] == wmatom[WMDelete])
921 ret = True;
922 XFree(protocols);
923 }
924 return ret;
925}
926
927static Bool
928isvisible(Client *c) {
929 unsigned int i;
930
931 for(i = 0; i < ntags; i++)
932 if(c->tags[i] && seltags[i])
933 return True;
934 return False;
935}
936
937static void
938keypress(XEvent *e) {
939 KEYS
940 unsigned int len = sizeof keys / sizeof keys[0];
941 unsigned int i;
942 KeyCode code;
943 KeySym keysym;
944 XKeyEvent *ev;
945
946 if(!e) { /* grabkeys */
947 XUngrabKey(dpy, AnyKey, AnyModifier, root);
948 for(i = 0; i < len; i++) {
949 code = XKeysymToKeycode(dpy, keys[i].keysym);
950 XGrabKey(dpy, code, keys[i].mod, root, True,
951 GrabModeAsync, GrabModeAsync);
952 XGrabKey(dpy, code, keys[i].mod | LockMask, root, True,
953 GrabModeAsync, GrabModeAsync);
954 XGrabKey(dpy, code, keys[i].mod | numlockmask, root, True,
955 GrabModeAsync, GrabModeAsync);
956 XGrabKey(dpy, code, keys[i].mod | numlockmask | LockMask, root, True,
957 GrabModeAsync, GrabModeAsync);
958 }
959 return;
960 }
961 ev = &e->xkey;
962 keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
963 for(i = 0; i < len; i++)
964 if(keysym == keys[i].keysym
965 && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
966 {
967 if(keys[i].func)
968 keys[i].func(keys[i].arg);
969 }
970}
971
972static void
973killclient(const char *arg) {
974 XEvent ev;
975
976 if(!sel)
977 return;
978 if(isprotodel(sel)) {
979 ev.type = ClientMessage;
980 ev.xclient.window = sel->win;
981 ev.xclient.message_type = wmatom[WMProtocols];
982 ev.xclient.format = 32;
983 ev.xclient.data.l[0] = wmatom[WMDelete];
984 ev.xclient.data.l[1] = CurrentTime;
985 XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
986 }
987 else
988 XKillClient(dpy, sel->win);
989}
990
991static void
992leavenotify(XEvent *e) {
993 XCrossingEvent *ev = &e->xcrossing;
994
995 if((ev->window == root) && !ev->same_screen) {
996 selscreen = False;
997 focus(NULL);
998 }
999}
1000
1001static void
1002manage(Window w, XWindowAttributes *wa) {
1003 unsigned int i;
1004 Client *c, *t = NULL;
1005 Window trans;
1006 Status rettrans;
1007 XWindowChanges wc;
1008
1009 c = emallocz(sizeof(Client));
1010 c->tags = emallocz(ntags * sizeof(Bool));
1011 c->win = w;
1012 c->x = wa->x;
1013 c->y = wa->y;
1014 c->w = wa->width;
1015 c->h = wa->height;
1016 c->oldborder = wa->border_width;
1017 if(c->w == sw && c->h == sh) {
1018 c->x = sx;
1019 c->y = sy;
1020 c->border = wa->border_width;
1021 }
1022 else {
1023 if(c->x + c->w + 2 * c->border > wax + waw)
1024 c->x = wax + waw - c->w - 2 * c->border;
1025 if(c->y + c->h + 2 * c->border > way + wah)
1026 c->y = way + wah - c->h - 2 * c->border;
1027 if(c->x < wax)
1028 c->x = wax;
1029 if(c->y < way)
1030 c->y = way;
1031 c->border = BORDERPX;
1032 }
1033 wc.border_width = c->border;
1034 XConfigureWindow(dpy, w, CWBorderWidth, &wc);
1035 XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
1036 configure(c); /* propagates border_width, if size doesn't change */
1037 updatesizehints(c);
1038 XSelectInput(dpy, w,
1039 StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
1040 grabbuttons(c, False);
1041 updatetitle(c);
1042 if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
1043 for(t = clients; t && t->win != trans; t = t->next);
1044 if(t)
1045 for(i = 0; i < ntags; i++)
1046 c->tags[i] = t->tags[i];
1047 applyrules(c);
1048 if(!c->isfloating)
1049 c->isfloating = (rettrans == Success) || c->isfixed;
1050 attach(c);
1051 attachstack(c);
1052 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
1053 ban(c);
1054 XMapWindow(dpy, c->win);
1055 setclientstate(c, NormalState);
1056 arrange();
1057}
1058
1059static void
1060mappingnotify(XEvent *e) {
1061 XMappingEvent *ev = &e->xmapping;
1062
1063 XRefreshKeyboardMapping(ev);
1064 if(ev->request == MappingKeyboard)
1065 keypress(NULL);
1066}
1067
1068static void
1069maprequest(XEvent *e) {
1070 static XWindowAttributes wa;
1071 XMapRequestEvent *ev = &e->xmaprequest;
1072
1073 if(!XGetWindowAttributes(dpy, ev->window, &wa))
1074 return;
1075 if(wa.override_redirect)
1076 return;
1077 if(!getclient(ev->window))
1078 manage(ev->window, &wa);
1079}
1080
1081static void
1082movemouse(Client *c) {
1083 int x1, y1, ocx, ocy, di, nx, ny;
1084 unsigned int dui;
1085 Window dummy;
1086 XEvent ev;
1087
1088 ocx = nx = c->x;
1089 ocy = ny = c->y;
1090 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1091 None, cursor[CurMove], CurrentTime) != GrabSuccess)
1092 return;
1093 c->ismax = False;
1094 XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
1095 for(;;) {
1096 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
1097 switch (ev.type) {
1098 case ButtonRelease:
1099 XUngrabPointer(dpy, CurrentTime);
1100 return;
1101 case ConfigureRequest:
1102 case Expose:
1103 case MapRequest:
1104 handler[ev.type](&ev);
1105 break;
1106 case MotionNotify:
1107 XSync(dpy, False);
1108 nx = ocx + (ev.xmotion.x - x1);
1109 ny = ocy + (ev.xmotion.y - y1);
1110 if(abs(wax + nx) < SNAP)
1111 nx = wax;
1112 else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
1113 nx = wax + waw - c->w - 2 * c->border;
1114 if(abs(way - ny) < SNAP)
1115 ny = way;
1116 else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
1117 ny = way + wah - c->h - 2 * c->border;
1118 resize(c, nx, ny, c->w, c->h, False);
1119 break;
1120 }
1121 }
1122}
1123
1124static Client *
1125nexttiled(Client *c) {
1126 for(; c && (c->isfloating || !isvisible(c)); c = c->next);
1127 return c;
1128}
1129
1130static void
1131propertynotify(XEvent *e) {
1132 Client *c;
1133 Window trans;
1134 XPropertyEvent *ev = &e->xproperty;
1135
1136 if(ev->state == PropertyDelete)
1137 return; /* ignore */
1138 if((c = getclient(ev->window))) {
1139 switch (ev->atom) {
1140 default: break;
1141 case XA_WM_TRANSIENT_FOR:
1142 XGetTransientForHint(dpy, c->win, &trans);
1143 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
1144 arrange();
1145 break;
1146 case XA_WM_NORMAL_HINTS:
1147 updatesizehints(c);
1148 break;
1149 }
1150 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
1151 updatetitle(c);
1152 if(c == sel)
1153 drawbar();
1154 }
1155 }
1156}
1157
1158static void
1159quit(const char *arg) {
1160 readin = running = False;
1161}
1162
1163static void
1164resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
1165 double dx, dy, max, min, ratio;
1166 XWindowChanges wc;
1167
1168 if(sizehints) {
1169 if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
1170 dx = (double)(w - c->basew);
1171 dy = (double)(h - c->baseh);
1172 min = (double)(c->minax) / (double)(c->minay);
1173 max = (double)(c->maxax) / (double)(c->maxay);
1174 ratio = dx / dy;
1175 if(max > 0 && min > 0 && ratio > 0) {
1176 if(ratio < min) {
1177 dy = (dx * min + dy) / (min * min + 1);
1178 dx = dy * min;
1179 w = (int)dx + c->basew;
1180 h = (int)dy + c->baseh;
1181 }
1182 else if(ratio > max) {
1183 dy = (dx * min + dy) / (max * max + 1);
1184 dx = dy * min;
1185 w = (int)dx + c->basew;
1186 h = (int)dy + c->baseh;
1187 }
1188 }
1189 }
1190 if(c->minw && w < c->minw)
1191 w = c->minw;
1192 if(c->minh && h < c->minh)
1193 h = c->minh;
1194 if(c->maxw && w > c->maxw)
1195 w = c->maxw;
1196 if(c->maxh && h > c->maxh)
1197 h = c->maxh;
1198 if(c->incw)
1199 w -= (w - c->basew) % c->incw;
1200 if(c->inch)
1201 h -= (h - c->baseh) % c->inch;
1202 }
1203 if(w <= 0 || h <= 0)
1204 return;
1205 /* offscreen appearance fixes */
1206 if(x > sw)
1207 x = sw - w - 2 * c->border;
1208 if(y > sh)
1209 y = sh - h - 2 * c->border;
1210 if(x + w + 2 * c->border < sx)
1211 x = sx;
1212 if(y + h + 2 * c->border < sy)
1213 y = sy;
1214 if(c->x != x || c->y != y || c->w != w || c->h != h) {
1215 c->x = wc.x = x;
1216 c->y = wc.y = y;
1217 c->w = wc.width = w;
1218 c->h = wc.height = h;
1219 wc.border_width = c->border;
1220 XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
1221 configure(c);
1222 XSync(dpy, False);
1223 }
1224}
1225
1226static void
1227resizemouse(Client *c) {
1228 int ocx, ocy;
1229 int nw, nh;
1230 XEvent ev;
1231
1232 ocx = c->x;
1233 ocy = c->y;
1234 if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
1235 None, cursor[CurResize], CurrentTime) != GrabSuccess)
1236 return;
1237 c->ismax = False;
1238 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
1239 for(;;) {
1240 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
1241 switch(ev.type) {
1242 case ButtonRelease:
1243 XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
1244 c->w + c->border - 1, c->h + c->border - 1);
1245 XUngrabPointer(dpy, CurrentTime);
1246 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1247 return;
1248 case ConfigureRequest:
1249 case Expose:
1250 case MapRequest:
1251 handler[ev.type](&ev);
1252 break;
1253 case MotionNotify:
1254 XSync(dpy, False);
1255 if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
1256 nw = 1;
1257 if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
1258 nh = 1;
1259 resize(c, c->x, c->y, nw, nh, True);
1260 break;
1261 }
1262 }
1263}
1264
1265static void
1266restack(void) {
1267 Client *c;
1268 XEvent ev;
1269 XWindowChanges wc;
1270
1271 drawbar();
1272 if(!sel)
1273 return;
1274 if(sel->isfloating || isarrange(floating))
1275 XRaiseWindow(dpy, sel->win);
1276 if(!isarrange(floating)) {
1277 wc.stack_mode = Below;
1278 wc.sibling = barwin;
1279 if(!sel->isfloating) {
1280 XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
1281 wc.sibling = sel->win;
1282 }
1283 for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
1284 if(c == sel)
1285 continue;
1286 XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
1287 wc.sibling = c->win;
1288 }
1289 }
1290 XSync(dpy, False);
1291 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1292}
1293
1294static void
1295run(void) {
1296 char *p;
1297 int r, xfd;
1298 fd_set rd;
1299 XEvent ev;
1300
1301 /* main event loop, also reads status text from stdin */
1302 XSync(dpy, False);
1303 xfd = ConnectionNumber(dpy);
1304 readin = True;
1305 while(running) {
1306 FD_ZERO(&rd);
1307 if(readin)
1308 FD_SET(STDIN_FILENO, &rd);
1309 FD_SET(xfd, &rd);
1310 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
1311 if(errno == EINTR)
1312 continue;
1313 eprint("select failed\n");
1314 }
1315 if(FD_ISSET(STDIN_FILENO, &rd)) {
1316 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
1317 case -1:
1318 strncpy(stext, strerror(errno), sizeof stext - 1);
1319 stext[sizeof stext - 1] = '\0';
1320 readin = False;
1321 break;
1322 case 0:
1323 strncpy(stext, "EOF", 4);
1324 readin = False;
1325 break;
1326 default:
1327 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
1328 for(; p >= stext && *p != '\n'; --p);
1329 if(p > stext)
1330 strncpy(stext, p + 1, sizeof stext);
1331 }
1332 drawbar();
1333 }
1334 while(XPending(dpy)) {
1335 XNextEvent(dpy, &ev);
1336 if(handler[ev.type])
1337 (handler[ev.type])(&ev); /* call handler */
1338 }
1339 }
1340}
1341
1342static void
1343scan(void) {
1344 unsigned int i, num;
1345 Window *wins, d1, d2;
1346 XWindowAttributes wa;
1347
1348 wins = NULL;
1349 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
1350 for(i = 0; i < num; i++) {
1351 if(!XGetWindowAttributes(dpy, wins[i], &wa)
1352 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
1353 continue;
1354 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
1355 manage(wins[i], &wa);
1356 }
1357 for(i = 0; i < num; i++) { /* now the transients */
1358 if(!XGetWindowAttributes(dpy, wins[i], &wa))
1359 continue;
1360 if(XGetTransientForHint(dpy, wins[i], &d1)
1361 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
1362 manage(wins[i], &wa);
1363 }
1364 }
1365 if(wins)
1366 XFree(wins);
1367}
1368
1369static void
1370setclientstate(Client *c, long state) {
1371 long data[] = {state, None};
1372
1373 XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
1374 PropModeReplace, (unsigned char *)data, 2);
1375}
1376
1377static void
1378setlayout(const char *arg) {
1379 unsigned int i;
1380
1381 if(!arg) {
1382 if(++ltidx == nlayouts)
1383 ltidx = 0;;
1384 }
1385 else {
1386 for(i = 0; i < nlayouts; i++)
1387 if(!strcmp(arg, layouts[i].symbol))
1388 break;
1389 if(i == nlayouts)
1390 return;
1391 ltidx = i;
1392 }
1393 if(sel)
1394 arrange();
1395 else
1396 drawbar();
1397}
1398
1399static void
1400setmwfact(const char *arg) {
1401 double delta;
1402
1403 if(!isarrange(tile))
1404 return;
1405 /* arg handling, manipulate mwfact */
1406 if(arg == NULL)
1407 mwfact = MWFACT;
1408 else if(1 == sscanf(arg, "%lf", &delta)) {
1409 if(arg[0] != '+' && arg[0] != '-')
1410 mwfact = delta;
1411 else
1412 mwfact += delta;
1413 if(mwfact < 0.1)
1414 mwfact = 0.1;
1415 else if(mwfact > 0.9)
1416 mwfact = 0.9;
1417 }
1418 arrange();
1419}
1420
1421static void
1422setup(void) {
1423 unsigned int i, j, mask;
1424 Window w;
1425 XModifierKeymap *modmap;
1426 XSetWindowAttributes wa;
1427
1428 /* init atoms */
1429 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
1430 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
1431 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
1432 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
1433 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
1434 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
1435 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
1436 PropModeReplace, (unsigned char *) netatom, NetLast);
1437
1438 /* init cursors */
1439 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
1440 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
1441 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
1442
1443 /* init geometry */
1444 sx = sy = 0;
1445 sw = DisplayWidth(dpy, screen);
1446 sh = DisplayHeight(dpy, screen);
1447
1448 /* init modifier map */
1449 modmap = XGetModifierMapping(dpy);
1450 for(i = 0; i < 8; i++)
1451 for(j = 0; j < modmap->max_keypermod; j++) {
1452 if(modmap->modifiermap[i * modmap->max_keypermod + j]
1453 == XKeysymToKeycode(dpy, XK_Num_Lock))
1454 numlockmask = (1 << i);
1455 }
1456 XFreeModifiermap(modmap);
1457
1458 /* select for events */
1459 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
1460 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
1461 wa.cursor = cursor[CurNormal];
1462 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
1463 XSelectInput(dpy, root, wa.event_mask);
1464
1465 /* grab keys */
1466 keypress(NULL);
1467
1468 /* init tags */
1469 compileregs();
1470 for(ntags = 0; tags[ntags]; ntags++);
1471 seltags = emallocz(sizeof(Bool) * ntags);
1472 seltags[0] = True;
1473
1474 /* init appearance */
1475 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
1476 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
1477 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
1478 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
1479 dc.sel[ColBG] = getcolor(SELBGCOLOR);
1480 dc.sel[ColFG] = getcolor(SELFGCOLOR);
1481 initfont(FONT);
1482 dc.h = bh = dc.font.height + 2;
1483
1484 /* init layouts */
1485 mwfact = MWFACT;
1486 nlayouts = sizeof layouts / sizeof layouts[0];
1487 for(blw = i = 0; i < nlayouts; i++) {
1488 j = textw(layouts[i].symbol);
1489 if(j > blw)
1490 blw = j;
1491 }
1492
1493 /* init bar */
1494 bpos = BARPOS;
1495 wa.override_redirect = 1;
1496 wa.background_pixmap = ParentRelative;
1497 wa.event_mask = ButtonPressMask | ExposureMask;
1498 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
1499 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
1500 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
1501 XDefineCursor(dpy, barwin, cursor[CurNormal]);
1502 updatebarpos();
1503 XMapRaised(dpy, barwin);
1504 strcpy(stext, "dwm-"VERSION);
1505 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
1506 dc.gc = XCreateGC(dpy, root, 0, 0);
1507 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
1508 if(!dc.font.set)
1509 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
1510
1511 /* multihead support */
1512 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
1513}
1514
1515static void
1516spawn(const char *arg) {
1517 static char *shell = NULL;
1518
1519 if(!shell && !(shell = getenv("SHELL")))
1520 shell = "/bin/sh";
1521 if(!arg)
1522 return;
1523 /* The double-fork construct avoids zombie processes and keeps the code
1524 * clean from stupid signal handlers. */
1525 if(fork() == 0) {
1526 if(fork() == 0) {
1527 if(dpy)
1528 close(ConnectionNumber(dpy));
1529 setsid();
1530 execl(shell, shell, "-c", arg, (char *)NULL);
1531 fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
1532 perror(" failed");
1533 }
1534 exit(0);
1535 }
1536 wait(0);
1537}
1538
1539static void
1540tag(const char *arg) {
1541 unsigned int i;
1542
1543 if(!sel)
1544 return;
1545 for(i = 0; i < ntags; i++)
1546 sel->tags[i] = arg == NULL;
1547 i = idxoftag(arg);
1548 if(i >= 0 && i < ntags)
1549 sel->tags[i] = True;
1550 arrange();
1551}
1552
1553static unsigned int
1554textnw(const char *text, unsigned int len) {
1555 XRectangle r;
1556
1557 if(dc.font.set) {
1558 XmbTextExtents(dc.font.set, text, len, NULL, &r);
1559 return r.width;
1560 }
1561 return XTextWidth(dc.font.xfont, text, len);
1562}
1563
1564static unsigned int
1565textw(const char *text) {
1566 return textnw(text, strlen(text)) + dc.font.height;
1567}
1568
1569static void
1570tile(void) {
1571 unsigned int i, n, nx, ny, nw, nh, mw, th;
1572 Client *c;
1573
1574 for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
1575 n++;
1576
1577 /* window geoms */
1578 mw = (n == 1) ? waw : mwfact * waw;
1579 th = (n > 1) ? wah / (n - 1) : 0;
1580 if(n > 1 && th < bh)
1581 th = wah;
1582
1583 nx = wax;
1584 ny = way;
1585 for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
1586 c->ismax = False;
1587 if(i == 0) { /* master */
1588 nw = mw - 2 * c->border;
1589 nh = wah - 2 * c->border;
1590 }
1591 else { /* tile window */
1592 if(i == 1) {
1593 ny = way;
1594 nx += mw;
1595 }
1596 nw = waw - mw - 2 * c->border;
1597 if(i + 1 == n) /* remainder */
1598 nh = (way + wah) - ny - 2 * c->border;
1599 else
1600 nh = th - 2 * c->border;
1601 }
1602 resize(c, nx, ny, nw, nh, RESIZEHINTS);
1603 if(n > 1 && th != wah)
1604 ny += nh + 2 * c->border;
1605 }
1606}
1607
1608static void
1609togglebar(const char *arg) {
1610 if(bpos == BarOff)
1611 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
1612 else
1613 bpos = BarOff;
1614 updatebarpos();
1615 arrange();
1616}
1617
1618static void
1619togglefloating(const char *arg) {
1620 if(!sel)
1621 return;
1622 sel->isfloating = !sel->isfloating;
1623 if(sel->isfloating)
1624 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
1625 arrange();
1626}
1627
1628static void
1629togglemax(const char *arg) {
1630 XEvent ev;
1631
1632 if(!sel || (!isarrange(floating) && !sel->isfloating) || sel->isfixed)
1633 return;
1634 if((sel->ismax = !sel->ismax)) {
1635 sel->rx = sel->x;
1636 sel->ry = sel->y;
1637 sel->rw = sel->w;
1638 sel->rh = sel->h;
1639 resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
1640 }
1641 else
1642 resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
1643 drawbar();
1644 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1645}
1646
1647static void
1648toggletag(const char *arg) {
1649 unsigned int i, j;
1650
1651 if(!sel)
1652 return;
1653 i = idxoftag(arg);
1654 sel->tags[i] = !sel->tags[i];
1655 for(j = 0; j < ntags && !sel->tags[j]; j++);
1656 if(j == ntags)
1657 sel->tags[i] = True;
1658 arrange();
1659}
1660
1661static void
1662toggleview(const char *arg) {
1663 unsigned int i, j;
1664
1665 i = idxoftag(arg);
1666 seltags[i] = !seltags[i];
1667 for(j = 0; j < ntags && !seltags[j]; j++);
1668 if(j == ntags)
1669 seltags[i] = True; /* cannot toggle last view */
1670 arrange();
1671}
1672
1673static void
1674unban(Client *c) {
1675 if(!c->isbanned)
1676 return;
1677 XMoveWindow(dpy, c->win, c->x, c->y);
1678 c->isbanned = False;
1679}
1680
1681static void
1682unmanage(Client *c) {
1683 XWindowChanges wc;
1684
1685 wc.border_width = c->oldborder;
1686 /* The server grab construct avoids race conditions. */
1687 XGrabServer(dpy);
1688 XSetErrorHandler(xerrordummy);
1689 XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
1690 detach(c);
1691 detachstack(c);
1692 if(sel == c)
1693 focus(NULL);
1694 XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
1695 setclientstate(c, WithdrawnState);
1696 free(c->tags);
1697 free(c);
1698 XSync(dpy, False);
1699 XSetErrorHandler(xerror);
1700 XUngrabServer(dpy);
1701 arrange();
1702}
1703
1704static void
1705unmapnotify(XEvent *e) {
1706 Client *c;
1707 XUnmapEvent *ev = &e->xunmap;
1708
1709 if((c = getclient(ev->window)))
1710 unmanage(c);
1711}
1712
1713static void
1714updatebarpos(void) {
1715 XEvent ev;
1716
1717 wax = sx;
1718 way = sy;
1719 wah = sh;
1720 waw = sw;
1721 switch(bpos) {
1722 default:
1723 wah -= bh;
1724 way += bh;
1725 XMoveWindow(dpy, barwin, sx, sy);
1726 break;
1727 case BarBot:
1728 wah -= bh;
1729 XMoveWindow(dpy, barwin, sx, sy + wah);
1730 break;
1731 case BarOff:
1732 XMoveWindow(dpy, barwin, sx, sy - bh);
1733 break;
1734 }
1735 XSync(dpy, False);
1736 while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
1737}
1738
1739static void
1740updatesizehints(Client *c) {
1741 long msize;
1742 XSizeHints size;
1743
1744 if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
1745 size.flags = PSize;
1746 c->flags = size.flags;
1747 if(c->flags & PBaseSize) {
1748 c->basew = size.base_width;
1749 c->baseh = size.base_height;
1750 }
1751 else if(c->flags & PMinSize) {
1752 c->basew = size.min_width;
1753 c->baseh = size.min_height;
1754 }
1755 else
1756 c->basew = c->baseh = 0;
1757 if(c->flags & PResizeInc) {
1758 c->incw = size.width_inc;
1759 c->inch = size.height_inc;
1760 }
1761 else
1762 c->incw = c->inch = 0;
1763 if(c->flags & PMaxSize) {
1764 c->maxw = size.max_width;
1765 c->maxh = size.max_height;
1766 }
1767 else
1768 c->maxw = c->maxh = 0;
1769 if(c->flags & PMinSize) {
1770 c->minw = size.min_width;
1771 c->minh = size.min_height;
1772 }
1773 else if(c->flags & PBaseSize) {
1774 c->minw = size.base_width;
1775 c->minh = size.base_height;
1776 }
1777 else
1778 c->minw = c->minh = 0;
1779 if(c->flags & PAspect) {
1780 c->minax = size.min_aspect.x;
1781 c->maxax = size.max_aspect.x;
1782 c->minay = size.min_aspect.y;
1783 c->maxay = size.max_aspect.y;
1784 }
1785 else
1786 c->minax = c->maxax = c->minay = c->maxay = 0;
1787 c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
1788 && c->maxw == c->minw && c->maxh == c->minh);
1789}
1790
1791static void
1792updatetitle(Client *c) {
1793 if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
1794 gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
1795}
1796
1797/* There's no way to check accesses to destroyed windows, thus those cases are
1798 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
1799 * default error handler, which may call exit. */
1800static int
1801xerror(Display *dpy, XErrorEvent *ee) {
1802 if(ee->error_code == BadWindow
1803 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
1804 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
1805 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
1806 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
1807 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
1808 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
1809 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
1810 return 0;
1811 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
1812 ee->request_code, ee->error_code);
1813 return xerrorxlib(dpy, ee); /* may call exit */
1814}
1815
1816static int
1817xerrordummy(Display *dsply, XErrorEvent *ee) {
1818 return 0;
1819}
1820
1821/* Startup Error handler to check if another window manager
1822 * is already running. */
1823static int
1824xerrorstart(Display *dsply, XErrorEvent *ee) {
1825 otherwm = True;
1826 return -1;
1827}
1828
1829static void
1830view(const char *arg) {
1831 unsigned int i;
1832
1833 for(i = 0; i < ntags; i++)
1834 seltags[i] = arg == NULL;
1835 i = idxoftag(arg);
1836 if(i >= 0 && i < ntags)
1837 seltags[i] = True;
1838 arrange();
1839}
1840
1841static void
1842zoom(const char *arg) {
1843 Client *c;
1844
1845 if(!sel || !isarrange(tile) || sel->isfloating)
1846 return;
1847 if((c = sel) == nexttiled(clients))
1848 if(!(c = nexttiled(c->next)))
1849 return;
1850 detach(c);
1851 attach(c);
1852 focus(c);
1853 arrange();
1854}
1855
1856int
1857main(int argc, char *argv[]) {
1858 if(argc == 2 && !strcmp("-v", argv[1]))
1859 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
1860 else if(argc != 1)
1861 eprint("usage: dwm [-v]\n");
1862
1863 setlocale(LC_CTYPE, "");
1864 if(!(dpy = XOpenDisplay(0)))
1865 eprint("dwm: cannot open display\n");
1866 screen = DefaultScreen(dpy);
1867 root = RootWindow(dpy, screen);
1868
1869 checkotherwm();
1870 setup();
1871 drawbar();
1872 scan();
1873 run();
1874 cleanup();
1875
1876 XCloseDisplay(dpy);
1877 return 0;
1878}